KR20050094671A - Cold air path structure of bottom freezer type refrigerator - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ice-making cold air flow path structure for installing a de-icing device insulated in a refrigerating chamber door and supplying cold air to the ice-making device and discharging cold air.

The ice making air flow path structure of the bottom freezer type refrigerator according to the present invention comprises: cold air generating means for discharging cold air generated with an evaporator and a blowing fan on the rear wall of the freezer compartment; An ice making apparatus which is installed to be insulated in the refrigerating chamber door and ices the supply water with the supplied cold and extracts and stores the iced ice; A first cold air supply passage for supplying the cold air discharged by the cold air generating means to a freezing compartment and a refrigerating compartment; And a second cold air supply passage for supplying the cold air discharged by the cold air generating means to the ice maker through the barrier and the side wall.

Description

Cold air path structure of bottom freezer type refrigerator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold air flow path structure for a bottom freezer type refrigerator, in particular, an ice making device is installed in a refrigerating compartment door, and a cold air discharge flow path used for supplying ice cold air for ice making to the ice making device and ice making.

In general, a refrigerator is used to freeze or refrigerate food and the like by lowering the temperature in the refrigerator by discharging cold air generated by a refrigeration cycle including a compressor, a condenser, an expansion valve, and an evaporator. Top Mount-Type compartments, Bottom Freezer-Type compartments for freezer compartments and freezer compartments, and Side-by-side type compartments for left and right compartment compartments for freezer compartments and refrigerator compartments. Side-Type).

Here, in the bottom freezer type refrigerator, as illustrated in FIG. 1, the upper refrigerator compartment 2 and the lower freezer compartment 3 are partitioned up and down by the barrier 11, and one for opening and closing the upper refrigerator compartment 2 is provided. More refrigerating compartment doors 4 are provided, and a freezing compartment door 5 for opening and closing the lower freezing compartment 3 is provided.

A bottom freezer type refrigerator having a conventional ice maker will be described with reference to FIG. 1 as follows.

As shown in FIG. 1, the refrigerator main body 1 in which the refrigerator compartment 2 and the freezer compartment 3 are divided into upper and lower sides by the barrier 11; A refrigerator compartment door (4) and a freezer compartment door (5) for opening and closing the refrigerator compartment (2) and the freezing compartment (3), respectively; A compressor (6) installed in the machine room to compress the refrigerant, an evaporator (7) and a blower fan (8) installed at the rear wall of the freezer compartment for supplying cold air, connected to the compressor (6) and the refrigerant pipe, and a freezer compartment for returning the cold air. The cold air return duct 9 and the refrigerating chamber cold air return duct 10 and the inside of the freezing chamber door 5 are installed inside the freezing chamber 3 to make ice water supplied and to take out and store the iced ice. It consists of an ice making device (30).

As shown in FIG. 3, a general ice maker 12 includes an ice maker 20 for ice-making supply water and extracting iced ice by cold air supplied to a freezing chamber, and an ice maker 20. It consists of the ice bank 30 which stores the ice taken out by it.

The ice making apparatus of the bottom freezer type refrigerator as described above will be described with reference to FIGS. 1 to 3.

As shown in FIG. 2, the refrigerant, which has been phase-changed into a low-temperature low-pressure gas phase state by the evaporator 7, is flowed to the compressor 6 and compressed from the low temperature low pressure to the high temperature high pressure through the compressor 6. The high-temperature, high-pressure gas phase refrigerant is cooled and condensed in the course of passing through the condenser, and phase-changed into a high-pressure liquid phase. As described above, the refrigerant phase-changed into a high-pressure liquid phase is passed through an expansion valve, by heat exchange in the evaporator 7. After being depressurized (thermally inflated) in an easy-to-evaporate state, the refrigerant is flowed into the evaporator 7 in which the evaporation process of the refrigerant is carried out. As described above, the refrigerant introduced into the evaporator 7 undergoes an endothermic action to absorb heat inside the refrigerator. After the phase change to the low-temperature low-pressure gas phase state to cool the air around it, it forms a refrigeration cycle that flows back into the compressor (6).

At this time, the air (cold air) cooled while losing heat to the refrigerant through heat exchange with the evaporator 7 is discharged from the freezing chamber 3 side by driving the blower fan 8 installed on the top of the evaporator 7. In this case, the cold air discharged by driving the blower fan 8 is branched to the freezing chamber 2 and the refrigerating chamber 3 according to the damper operation.

In particular, the cold air discharged to the freezer compartment 3 side flows into the ice maker 20 of the ice maker 12 installed in the freezer compartment 3 to perform an ice making operation in the ice maker 12.

As shown in FIG. 3, the ice maker 20 has an ice making chamber 21 in which ice is generated, and a water supply unit formed at one side of the ice making chamber 21 to supply water to the ice making chamber 21. (22) is formed.

The ice making chamber 21 has a substantially semi-cylindrical shape, and partition ribs 21a are formed to protrude upward at predetermined intervals so that ice can be separated therein. In addition, a fastening part 25 is formed at a rear portion of the ice making chamber 21 so as to fix the ice making device to the freezing chamber.

The motor unit 23 is installed at one side of the ice making chamber 21. The motor unit 23 has a motor embedded therein, the ejector 24 (ejector) is rotatably connected to the rotation shaft of the motor.

The ejector 24 is installed so that the rotating shaft crosses the center of the ice making chamber 21, and a plurality of ejector pins 24a are spaced at predetermined intervals so that the rotating shaft of the ejector 24 is substantially perpendicular to the rotating shaft. do. At this time, the ejector pins 24a are disposed for each section partitioned by the partition ribs 21a.

A plurality of slide bars 26 extend to the upper end of the front side of the ice making chamber 21 to about the rotation axis of the ejector 24.

In addition, a heater (not shown) is attached to a bottom surface of the ice making chamber 21. The heater heats the surface of the ice making chamber for a short time to slightly melt the ice surface attached to the surface of the ice making chamber so that the ice can be easily separated from the ice making chamber 21.

The ice maker 20 is provided with an ice-covering arm 28 to measure the amount of ice filled in the ice bank 30. The ice detection arm 28 is installed to be movable up and down and is connected to a control unit embedded in the motor unit 23. By the action of the ice detection arm 28 and the control unit, the ice bank 30 is filled with a certain amount of ice.

The ice bank 30 stores the falling ice.

Looking at the operation of such an ice making apparatus, when ice making is completed in the ice maker 20 through the ice making operation, the lower end of the ice maker 20 is placed in a state where ice is easily separated through a heater installed on the bottom of the ice maker 20. After heating, the ice is separated by the rotation of the ejector 24 installed to be rotatable in the ice maker 20 and stored in the ice bank 30 installed at the bottom of the ice maker 20.

The cold air supplied by the evaporator and the blower fan is supplied through the cold air supply duct 2a provided on the rear wall of the refrigerating chamber, and is supplied to the refrigerating chamber by the cold air discharge port 2b. The cold air used by the refrigerating compartment 2 is returned to the lower part of the evaporator through the return duct 10.

However, in the conventional bottom freezer type refrigerator, the ice dispenser does not exist in the product in which the dike device is installed in the freezer compartment. In addition, there is a problem that can not be used as a high volume as the space occupied by the ice making apparatus in the freezer compartment, there was a big problem that the overall use volume of the refrigerator is reduced.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an ice making air flow channel structure for installing an ice making device as an insulated case in a refrigerating compartment door and supplying cold air to the ice making device and discharging the ice making air.

Another object of the present invention is to independently configure the flow path for supplying the cool air generated in the rear wall of the freezer compartment to the freezer compartment and the refrigerating compartment, the flow path for supplying to the ice maker installed insulated from the refrigerating chamber door, so as to adjust the cold air supplied to each flow passage It is an object of the present invention to provide a structure for making an ice cold air passage.

Another object of the present invention is to supply the cold air supplied by the evaporator and the blower fan to the ice making device through the first cold air supply duct of the barrier, the second cold air supply duct of the side wall, the cold air used in the ice making device formed on the side wall Its purpose is to provide an ice-making cold air flow path structure that allows the cold air supply duct to be supplied to the freezer compartment.

Another object of the present invention is to provide an ice making cold flow path structure that can be supplied separately to the supply mode of the freezer compartment and the refrigerating compartment cold air, and the supply mode of the ice making cold air.

It is still another object of the present invention to provide an ice making cold air flow path structure in which one or more fans are installed in a space where an evaporator is installed to supply cold air through different ducts so that the cold air is supplied through a selected path.

Deicing cold air flow path structure of the bottom freezer type refrigerator according to the present invention for achieving the above object,

Cold air generating means for discharging cold air generated with an evaporator and a blowing fan on the rear wall of the freezing chamber;

An ice making apparatus which is installed to be insulated in the refrigerating chamber door and ices the supply water with the supplied cold and extracts and stores the iced ice;

A first cold air supply passage for supplying the cold air discharged by the cold air generating means to a freezing compartment and a refrigerating compartment;

And a second cold air supply passage for supplying the cold air discharged by the cold air generating means to the ice maker through the barrier and the side wall.

Preferably, the first cold air supply flow path is a cold air discharge port for directly discharging the cold air discharged by the cold air generating means to the freezer compartment, and a cold compartment cold air for supplying cold air to the refrigerating chamber after flowing cold air through the rear wall of the refrigerator body. It characterized in that it comprises a supply duct.

Preferably, the second cold air supply passage communicates with the first cold air supply duct installed in the barrier to flow the cold air discharged by the cold air generating means, and one side of the first cold air supply duct, and through the side wall of the refrigerator compartment door. And a second cold air supply duct for supplying the cold air to the ice making device.

Preferably, the refrigerator may further include a third cold air supply duct which communicates with one side of an ice making device of the refrigerating compartment door and supplies cold air to the freezing compartment through a side wall.

Preferably, one side is in communication with the ice making device of the refrigerating compartment door to communicate the cold air return duct of the lower part of the evaporator through the side wall, characterized in that for returning the cold air used for ice making to the evaporator.

Preferably, the cold air generating means is an evaporator for heat exchange at low temperature and low pressure, a first blower fan installed on the evaporator and driven to supply cold air to a first cold air supply passage, and installed on the other upper part of the evaporator. And a blowing fan having a second blowing fan that is driven to supply cold air through the two cold air supply passages.

Preferably, the second blowing fan is characterized in that the fixed pressure fan.

Preferably, the ice making apparatus includes an insulation case and an insulation cover forming an insulation space inside the refrigerating compartment door, and an ice making duct perpendicular to the side surface of the insulation case and communicating with the other side of the second cold air supply duct and the ice making space. And an ice maker for ice-feeding the supply water with cold water flowing into the ice making duct and taking out the iced ice, an ice bank for storing the ice taken out by the ice maker, and an ice outlet formed at the bottom of the ice bank. And a cold air outlet for discharging the cold air used for the ice making to the third cold air supply duct.

Preferably, the cooling air generated by the cold air generating means is controlled to control the driving of the first and the second blowing fan to be supplied to the selected flow path of the first cold air supply passage and the second cold air supply passage. It features.

Hereinafter, with reference to the accompanying drawings as follows.

As shown in FIG. 4, the barrier 111 partitioning the refrigerator compartment 102 and the freezer compartment 103 up and down, and the refrigerator compartment doors 104 and 105 for opening and closing the refrigerator compartment 102 and the freezer compartment 103. And an evaporator 107 and a plurality of blowing fans 108 and 108b, cold air return ducts 109 and 110, and a barrier 111 installed in the coolant discharged by the second blowing fan 108b. One cold air supply duct 120 and one side of the first cold air supply duct 120 communicate with each other, the second cold air supply duct 121 is installed on the side wall, and installed in the inner heat insulating space of the refrigerating compartment door 104 and the second cold air The ice making device 130 which receives the cold air of the supply duct 121 and ices the supplied water and stores the iced ice, and flows the cold air used in the ice making device 130 to the freezing chamber 103 on the other side. The third cold air supply duct 128 is discharged.

Here, the ice making device 130 is sealed to the heat insulating space by the heat insulating cover 131 and the heat insulating case 132, the ice maker 133 and the ice bank 134 is installed inside, the cold air inlet at the bottom side An ice making duct 125 for supplying the cold air flowing into the ice maker 133 to the upper portion is provided with a third cold air for discharging cold air used for ice making by the ice making space 130a in the center thereof. And a cold air outlet 127 in communication with the supply duct 128.

Referring to the accompanying drawings, the ice making air flow path structure of the bottom freezer type refrigerator according to the embodiment of the present invention configured as described above is as follows.

4 to 6, in the bottom freezer type refrigerator 100, an upper refrigerating compartment 102 and a lower freezing compartment 103 are partitioned by a barrier 111, and an ice making device is formed in one refrigerating compartment door 104. 130) is installed insulated.

In order to install the ice making device 130 inside the refrigerating compartment door 104, a circumference of the ice making device 130 is sealed by a heat insulating case 132 and a heat insulating cover 131 by an insulating space, and the inside of the ice making device 130 is illustrated in FIGS. As shown in FIG. 6, the ice maker 133 and the ice bank 134 are installed.

Here, the ice maker 130 receives the cold air discharged by the blower fan 108b by the first and second cold air supply ducts 120 and 121 to maintain the temperature in the ice making space 130a below a certain level. Can be. Accordingly, the ice maker 133 ices the supplied water, removes the iced ice, and stores the iced water in the ice bank 134. The cold air used for ice making flows along the third cold air supply duct 128 through the cold air outlet 127 in the center and is supplied to the freezing compartment. Here, in another embodiment, a predetermined flow path may be formed in the heat insulation case 132 of the ice making device 130 so that cold air used for ice making may be directly discharged to the refrigerating chamber.

Since the ice maker 130 is installed in the refrigerating chamber door 104, a flow path for directly supplying the freezer cold air to the ice maker 130 or directly to the freezer compartment 103 and the refrigerating chamber 104 may be provided.

That is, as shown in FIG. 4, the cold air discharged by the evaporator 107 and the second blower fan 108b installed on the other side of the upper part of the evaporator is formed through the first and second cold air supply ducts 120 and 121. And a second supplying cold air discharged by the evaporator 107 and the first blowing fan 108 to the refrigerating chamber 103 and the freezing chamber 104 as shown in FIG. 5. Can be used separately in cold air supply mode. That is, the cold air supply flow passages are respectively configured.

Here, the first cold air supply mode is a mode for rapidly deicing the ice making action, and the second cold air supply mode is a mode for not using the ice maker 130. Therefore, these modes can be controlled by the control unit through the user's selection control and timing control from the outside, each can be used alone or in common.

The second blower fan 108b is used as a fixed pressure fan and discharges cold air at a constant high pressure, thereby allowing the second blower fan 108b to flow along the second cold air supply duct 121. That is, since the fixed pressure fan constitutes the duct, the air resistance is large, and thus the amount of air that can reduce the temperature difference between the discharge cold and the freezing compartment can be increased.

First, in the first cold air supply mode, the freezer compartment cold air is supplied to the ice maker 130.

To this end, the first cold air supply duct 120 formed on the ceiling or the barrier of the freezer compartment, the second cold air supply duct 121 for flowing the cold air of the first cold air supply duct 120 to the ice maker 130 through the side wall, ice It is composed of an ice making duct 125 for supplying to the maker 133, and a third cold air supply duct 128 for supplying the cold air discharged from the ice making device 130 through the side wall to supply the freezing chamber 103. .

Here, the first cold air supply duct 120 flows the cold air discharged by the evaporator 107 and the second blowing fan 108b installed on the rear wall of the refrigerator body 101, and the second cold air supply duct 121 It is formed on the side wall of the refrigerator body 101 to supply cold air by communicating the first cold air supply duct 120 and the first cold air inlet 124 of the ice making device 130.

And, the ice making duct 125 is formed perpendicular to the side of the heat insulation case 132 of the embankment device 130, the cold air introduced through the first cold air inlet 124 of the lower end of the second cold air inlet 126 of the upper end ) To supply the freezer cold air directly to the ice maker (133).

The third cold air supply duct 128 has one side communicated with the cold air outlet 127 formed at the center of the ice maker 130, and the other side communicates with the cold air outlet 129 of the freezer compartment 103, thereby making the ice maker 130 an ice maker 130. It supplies the cold air used by the freezer compartment 103.

Here, since the ice making air is directly supplied to the ice maker 133 by the ice making duct 125, a cold air circulation flow path is formed which flows into the upper portion of the ice making unit 130 and exits to the lower portion. .

Specifically, the ice making device 130, as shown in Figure 6, the heat insulating cover 131 and the heat insulating case 132, the ice maker 133 and the ice bank 134 is configured in the heat insulating case 132 The dispenser 137 is configured to discharge the stored ice to the outside of the refrigerating compartment door 104.

The heat insulation case 132 is used to insulate the cold air in the refrigerating compartment 102 from entering the ice maker 130 installed inside the refrigerating compartment door 104. The ice maker 121 and the ice bank 130 are insulated from each other. ) To form a predetermined space where it can be installed. A heat insulation cover 131 made of a heat insulating material is installed on the front surface of the heat insulation case 132 so that the open heat insulation case 132 is completely sealed through the heat insulation cover 131.

In addition, an ice making duct 125 having a first cold air inlet 124, a first cold air inlet 124 on one side, and a second cold air inlet 126 on the other side, in the sidewall direction of the heat insulation case 132. ), A cold air outlet 127 for supplying the cold air used for ice making to the freezing chamber through the third cold air supply duct 128 is formed.

The first cold air inlet 124 formed at the lower end of the heat insulation case 132 has cold air flowing in communication with the second cold air supply duct 121 through the first cold air inlet 124 and the second ice duct 125 and the second cold air inlet 124. The cold air flowing into the ice making space (130a of FIG. 4) through the cold air inlet 126, and the cold air flowing into the ice making space 130a ices the water supplied to the ice maker 133, and the ice generated by the ice making is completed. Is taken out and stored in the ice bank 134.

In addition, the dispenser 137 is installed at the front side of the refrigerating compartment door, and the ice stored in the ice bank 130 is discharged through the air outlet 136 formed on the bottom surface of the heat insulation case 132, so that the user can remove the button from the outside. By controlling it, the ice can be discharged to the outside.

The cold air used for ice making by the ice making device 130 is discharged to the third cold air supply duct 128 through the cold air outlet 127. Here, the cold air outlet 127 is bent and communicated with the cold air discharge hole (127a) of the inner side to be formed in a different space from the ice making duct (125).

As illustrated in FIGS. 6 and 7, the first air inlet 124 coupled with the cold air outlet 121a of the second cold air supply duct 121 is illustrated in FIGS. 6 and 7. After being introduced into, the ice maker 133 is supplied to the ice maker 133 through the ice making duct 125 and the second cold air inlet 126 and used as the ice making ice. Thereafter, the cold air used for ice making is discharged through the cold air outlet 127 formed between the first and second cold air inlets 124 and 126, and the discharged cold air is combined with the cold air outlet 127. 128a) and then flows along the third cold air supply duct 128, and then is supplied to the freezing chamber 103 through the cold air outlet 129.

In addition, the cold air outlet 121a of the first cold air inlet 124 of the ice making duct 125 of the ice making device 130 and the cold air outlet 121a of the second cold air supply duct 121, and the cold air outlet 124 of the side surface of the heat insulation case 132. And cold air inlets 128a of the third cold air supply duct 128 are coupled to each other in an uneven shape. As another embodiment, the coupling means may be coupled to a packing member such as rubber or gasket, which is not concave-convex. Here, at least one damper is installed on the flow paths of the second and third cold air supply ducts 121 and 128 to adjust the amount of cold air supplied to the refrigerating chamber and to control the ice making efficiency.

Therefore, the second cold air supply duct 121 and the third cold air supply duct 128 are formed substantially vertically on the sidewalls of the refrigerator body 101, thereby flowing in the vertically upward direction of the freezer compartment cold air and vertically downward direction of the ice making cold air. Enable flow to At least one fan may be installed on the flow path of the second cold air supply duct 121 and the third cold air supply duct 128.

As such, when the ice making apparatus 130 needs to be cooled, that is, when the temperature of the ice making space increases due to the rapid deicing function or the load of the ice making space increasing, only the ice making space may be separately operated. Because, in general, the freezer compartment does not matter even if the temperature is low, but the refrigerator compartment is low temperature, so when stored below freezing, there is a problem that the stored food freezes, so when circulating the cold air discharged from the ice making space to the refrigerating compartment, the cycle can be operated only for the ice making space. However, when circulating to the freezer compartment, the operation is possible only by the ice making space.

In addition, by directly returning the discharged cold air from the ice maker 130 to the freezer compartment, the discharge cold air temperature does not significantly differ from the temperature of the freezer compartment, thereby solving the problem of freezing in the duct.

Meanwhile, as shown in FIG. 5, the second cold air supply mode is supplied to the freezing chamber 103 and the refrigerating chamber 102, and the cold air discharged by the evaporator 107 and the first blowing fan 108 is freezing chamber 103. It is supplied to the refrigerating chamber, and flows along the refrigerating chamber cold air supply duct 102a, and is then supplied to the refrigerating chamber 102 through the cold air discharge port 102b. The cold air supplied to the refrigerating compartment 102 is returned through the cold air return duct 110, and the cold air supplied to the freezing compartment 103 is returned through the cold air return duct 109.

8 is another embodiment of the present invention.

Referring to FIG. 8, the third cold air supply duct 228 communicates with one side of the ice making device 130 and the other side communicates with the cold air return duct 109, thereby allowing the cold air used for ice making by the ice making device 130. Through the cold return duct 109 can be returned or reduced. Accordingly, the discharged cold air in the ice making space is circulated directly to the inlet of the evaporator, so that freezing occurs in the freezer even when the cold air from the ice making temperature is high. In other words, the moisture contained in the cold air discharged from the ice making space is removed from the evaporator to solve the problem of freezing.

So far, the present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

As described above, according to the ice-making cold air passage structure of the bottom freezer type refrigerator according to the embodiment of the present invention, an ice making device is installed in the refrigerating compartment door, and cold air used in the duct and ice making to supply the lower freezer cold air to the refrigerating compartment door. By introducing into the freezer or cold air return duct, it increases the volume of the freezer, there is an effect that can take out the ice from the outside.

1 is a configuration diagram showing a conventional bottom freezer type refrigerator.

2 is a configuration diagram in which an ice making device of a conventional bottom freezer type refrigerator is installed.

3 is a detailed configuration diagram of a general embankment device.

4 is a side cross-sectional view illustrating a structure of a cold air flow path for ice making in a bottom freezer type refrigerator according to an embodiment of the present invention.

Figure 5 is a side cross-sectional view showing a cold air supply flow path to the refrigerator compartment and the freezer compartment in Figure 4 of the present invention.

6 is a structure of the embankment installed in the refrigerator compartment door of FIG.

7 is a flow path connecting structure of the ice making apparatus installed in the refrigerating compartment door in FIG. 4 of the present invention.

8 is a side cross-sectional view illustrating a structure of a cold air flow path for ice making of a bottom freezer type refrigerator according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100 ... fridge 102 ... fridge

103 ... Freezer 104,105 ... Door

107 ... Evaporator 108 ... Blowing Fan

Cold return duct 111 Barrier

120,121,128,228 ... cold supply duct

130 Ice machine 131 Insulation cover

132 Insulation Case 133 Ice Maker

134 Ice Bank 137 Dispenser

125.Ice duct

Claims (9)

In the bottom freezer type refrigerator in which the freezer compartment and the refrigerating compartment are divided up and down, Cold air generating means for discharging cold air generated with an evaporator and a blowing fan on the rear wall of the freezing chamber; An ice making apparatus which is installed to be insulated in the refrigerating chamber door and ices the supply water with the supplied cold and extracts and stores the iced ice; A first cold air supply passage for supplying the cold air discharged by the cold air generating means to a freezing compartment and a refrigerating compartment; And a second cold air supply passage for supplying the cold air discharged by the cold air generating means to the ice maker through the barrier and the side wall. The method of claim 1, The first cold air supply flow path includes a cold air discharge port for directly discharging the cold air discharged by the cold air generating means to the freezing compartment, and a cold room cold air supply duct for supplying cold air to the cold room rear wall after supplying cold air through the rear wall of the refrigerator main body. An ice making cold air flow path structure of a bottom freezer type refrigerator comprising: a. The method of claim 1, The second cold air supply passage communicates with the first cold air supply duct installed in the barrier to flow the cold air discharged by the cold air generating means, and the first cold air supply duct is connected to one side of the cold air supply duct. An ice making air flow path structure of a bottom freezer type refrigerator comprising a second cold air supply duct for supplying the cold air. The method according to claim 1 or 4, One side is in communication with the ice making device of the refrigerating compartment door, and further comprising a third cold air supply duct for supplying cold air to the freezer through the side wall freezer cold air flow structure of the bottom freezer type refrigerator. The method according to claim 1 or 4, One side is in communication with the ice making device of the refrigerating compartment door and communicates with the cold air return duct of the lower part of the evaporator through the side wall to return the cold air used for ice making to the evaporator, the ice freezer structure of the bottom freezer type refrigerator . The method of claim 1, The cold air generating means is an evaporator for heat exchange at low temperature and low pressure, a first blower fan installed at an upper portion of the evaporator and driven to supply cold air to a first cold air supply passage, and installed at an upper upper side of the evaporator and supplying a second cold air. An ice making cold air flow path structure of a bottom freezer type refrigerator comprising a blowing fan having a second blowing fan driven to supply cold air through the flow path. The method of claim 6, The second blower fan is a fixed pressure fan, ice-making cold air flow path structure of the bottom freezer type refrigerator. The method of claim 1, The ice maker includes an insulation case and an insulation cover forming an insulation space inside the refrigerating compartment door, an ice making duct perpendicular to a side surface of the insulation case, and communicating with the other side of the second cold air supply duct and an ice making space. A door connected to an ice maker for ice-feeding water into the ice-making duct and taking out the iced ice, an ice bank for storing the ice taken out by the ice maker, and an ice outlet formed at the bottom of the ice bank. An ice making air flow path structure of a bottom freezer type refrigerator comprising a front dispenser and a cold air outlet for discharging cold air used in the ice making to a third cold air supply duct. The method according to claim 1 or 6, And controlling the driving of the first and second blower fans by a control means to supply the cool air generated by the cold air generating means to the selected flow path among the first cold air supply passage and the second cold air supply passage. Defrosting cold air flow path structure of the bottom freezer type refrigerator.